add every

README.md

@@ -137,6 +137,7 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 - [util/bsearch](https://openhome.cc/eGossip/OpenSCAD/lib3x-bsearch.html)	
 - [util/choose](https://openhome.cc/eGossip/OpenSCAD/lib3x-choose.html)
 - [util/dedup](https://openhome.cc/eGossip/OpenSCAD/lib3x-dedup.html)
+- [util/every](https://openhome.cc/eGossip/OpenSCAD/lib3x-every.html)
 - [util/fibseq](https://openhome.cc/eGossip/OpenSCAD/lib3x-fibseq.html)	
 - [util/flat](https://openhome.cc/eGossip/OpenSCAD/lib2x-flat.html)
 - [util/has](https://openhome.cc/eGossip/OpenSCAD/lib2x-has.html)

docs/lib3x-every.md

@@ -0,0 +1,17 @@
+# every
+
+The `every` function tests whether all elements in the list pass the test implemented by the provided function. 
+
+**Since:** 3.0
+
+## Parameters
+
+- `lt` : the list.
+- `test` : a test function that accepts an element and returns `true` or `false`.
+
+## Examples
+
+    use <util/every.scad>;
+   
+    biggerThanZero = function(elem) elem > 0;
+    assert(every([1, 30, 39, 29, 10, 13], biggerThanZero));

src/util/every.scad

@@ -1,3 +1,13 @@
+/**
+* every.scad
+*
+* @copyright Justin Lin, 2021
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-dedup.html
+*
+**/ 
+
 use <_impl/_every.scad>;
 
 function every(lt, test) = _every(lt, test, len(lt));